CN111354298A - Pixel circuit, display device and driving method - Google Patents
Pixel circuit, display device and driving method Download PDFInfo
- Publication number
- CN111354298A CN111354298A CN201811482315.9A CN201811482315A CN111354298A CN 111354298 A CN111354298 A CN 111354298A CN 201811482315 A CN201811482315 A CN 201811482315A CN 111354298 A CN111354298 A CN 111354298A
- Authority
- CN
- China
- Prior art keywords
- module
- active device
- control
- pixel circuit
- display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Control Of El Displays (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The embodiment of the invention relates to the field of display, and discloses a pixel circuit, a display device and a driving method. In some embodiments of the present application, a pixel circuit includes: the device comprises N control modules, a display module and a selection module; the selection module is used for controlling N control modules to drive the display modules in turn, the time length of each control module driving the display module is T/N, N is a positive integer greater than 1, 1/T is the refresh frequency of a pixel circuit driven by one control module, and T is a positive integer. In this implementation, the limitation of the response speed of the active device to the refresh frequency of the pixel circuit is reduced.
Description
Technical Field
The embodiment of the invention relates to the field of display, in particular to a pixel circuit, a display device and a driving method.
Background
The refresh frequency of the display refers to the updating speed of the image on the screen, and the higher the refresh frequency is, the smaller the flicker feeling of the image on the screen is, the higher the stability is, and the better the eyesight is protected. In the ordinary display, the refreshing frequency is kept above 60Hz, so that better display quality can be generated, and flicker is not caused. For 3D display or game video display with higher requirements, if the refresh frequency does not reach a certain value, visual fatigue will occur. With the increase of refresh frequency, the response speed of active devices is required to be higher and higher.
However, the inventors found that at least the following problems exist in the prior art: the response speed of the current active device cannot meet the requirement of ultrahigh refresh frequency, so that the ultrahigh refresh frequency of a screen cannot be realized.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
An object of embodiments of the present invention is to provide a pixel circuit, a display device, and a driving method that reduce the limitation of the response speed of an active device on the refresh frequency of the pixel circuit.
To solve the above technical problem, an embodiment of the present invention provides a pixel circuit including: the device comprises N control modules, a display module and a selection module; the selection module is used for controlling the N control modules to drive the display modules in turn, the time length of each control module driving the display module is T/N, N is a positive integer greater than 1, 1/T is the refresh frequency, and T is a positive integer.
Embodiments of the present invention also provide a display device including the pixel circuit mentioned in the above embodiments.
An embodiment of the present invention further provides a driving method applied to the pixel circuit mentioned in the above embodiment, including: the selection module controls N control modules to drive the display module for T/N duration in turn; n is a positive integer greater than 1, 1/T is a refresh frequency, and T is a positive integer; and the control module drives the display module when determining that the selection module selects the self-driven display module.
Compared with the prior art, the pixel circuit comprises a plurality of control modules, the control modules drive the display modules in turn for T/N time length, the data writing time is changed to be 1/N of the writing time of the pixel circuit of the display module driven by one control module, the refreshing frequency of the pixel circuit is increased to be N times of the refreshing frequency of the pixel circuit driven by one control module, and the limitation of the response speed of an active device on the refreshing frequency of the pixel circuit is reduced.
Further, optionally, each control module comprises: the driving submodule and the switch submodule; the driving submodule is connected with the switch submodule in series, and when the switch submodule is conducted under the control of the selection module, the driving submodule drives the display module. The selection module controls the switch sub-modules to enable each driving sub-module to respectively drive the display module for T/N duration, so that the refreshing frequency of the pixel circuit is increased to be N times of the refreshing frequency of the pixel circuit driven by one control module.
In addition, optionally, the number of the control modules is 2, and the control modules are respectively a first control module and a second control module. The two control modules drive the display modules in turn, and compared with a pixel circuit which only uses one control module to drive the display modules, the refreshing frequency is increased by two times.
In addition, optionally, the pixel circuit further includes a power module, the first control module includes a first driving submodule and a first switch submodule, and the second control module includes a second driving submodule and a second switch submodule; wherein the first driver submodule includes: the first active device, the second active device and the first energy storage element; the control end of the first active device is connected with a first scanning signal line, the first end of the first active device is electrically connected with a first data signal line, the second end of the first active device is electrically connected with the control end of the second active device, the first end of the second active device is electrically connected with the power module, the second end of the second active device is electrically connected with the first end of the first switch submodule, and the first energy storage element is connected between the control end of the second active device and the first end of the second active device in parallel; the control end of the first switch submodule is electrically connected with the selection module, the second end of the first switch submodule is connected with the anode of the display module, and the cathode of the display module is grounded; the second drive submodule includes: a third active device, a fourth active device and a second energy storage element; the control end of the third active device is connected with the second scanning signal line, the first end of the third active device is electrically connected with the second data signal line, the second end of the third active device is electrically connected with the control end of the fourth active device, the first end of the fourth active device is electrically connected with the power module, the second end of the fourth active device is electrically connected with the first end of the second switch submodule, and the second energy storage element is connected between the control end of the fourth active device and the first end of the fourth active device in parallel; the control end of the second switch submodule is electrically connected with the selection module, and the second end of the second switch submodule is connected with the anode of the display module.
In addition, optionally, the first energy storage element and the second energy storage element are capacitors; the first active device, the second active device, the third active device and the fourth active device are all P-type transistors, or the first active device, the second active device, the third active device and the fourth active device are all N-type transistors.
In addition, optionally, the first switch submodule is a P-type transistor, and the second switch submodule is an N-type transistor; or the first switch submodule is an N-type transistor, and the second switch submodule is a P-type transistor.
Additionally, optionally, the selection module comprises: and selecting 1 from N.
In addition, optionally, the P-type transistor is a P-type thin film transistor, and the N-type transistor is an N-type thin film transistor.
Optionally, the first active device, the second active device, the third active device and the fourth active device are manufactured by a complementary metal oxide semiconductor CMOS process, so that the pixel circuit has lower power consumption, faster response speed and stronger interference resistance.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic structural diagram of a pixel circuit according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a pixel circuit according to a second embodiment of the present invention;
fig. 3 is a circuit diagram of a pixel circuit in a specific implementation of a second embodiment of the invention;
fig. 4 is a driving timing chart of a pixel circuit of the second embodiment of the present invention;
fig. 5 is a circuit diagram of a pixel circuit in another specific implementation of the second embodiment of the present invention;
fig. 6 is a schematic structural view of a display device in a concrete implementation of a third embodiment of the present invention;
fig. 7 is a driving timing chart of a display device according to a third embodiment of the present invention;
fig. 8 is a flowchart of a driving method according to a fourth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
A first embodiment of the present invention relates to a pixel circuit, as shown in fig. 1, including: n control modules 101, a display module 102 and a selection module 103; the selection module 103 is configured to control the N control modules 101 to drive the display modules 102 in turn, where a time length for each control module 101 to drive the display module 102 is T/N, N is a positive integer greater than 1, 1/T is a refresh frequency of a pixel circuit driven by one control module, and T is a positive integer.
In an embodiment, the display module 102 may be an Organic Light-emitting diode (OLED) or other Light-emitting devices, and the type of the display module 102 is not limited in this embodiment.
In this embodiment mode, in the case of using the same type of active device, the pixel circuit provided by the embodiment of the invention makes the data writing time become 1/N of the writing time of the pixel circuit driving the display module by one control module, and the refresh frequency of the pixel circuit is increased to N times of the refresh frequency of the pixel circuit driving by one control module.
In one embodiment, each control module 101 includes: the driving submodule and the switch submodule; the driving submodule is connected with the switch submodule in series, and when the switch submodule is conducted under the control of the selection module, the driving submodule drives the display module. The selection module controls the switch sub-modules to enable each driving sub-module to respectively drive the display module for T/N duration, so that the refreshing frequency of the pixel circuit is increased to be N times of the refreshing frequency of the pixel circuit driven by one control module.
The pixel circuit provided by the embodiment of the invention can be applied to Display devices such as an Active Matrix Organic Light Emitting Diode (AMOLED), a Micro Light Emitting Diode (Micro LED), an Active Matrix Liquid Crystal Display (AMLCD), and the like.
It should be noted that each module referred to in this embodiment is a logical module, and in practical applications, one logical unit may be one physical unit, may be a part of one physical unit, and may be implemented by a combination of multiple physical units. In addition, in order to highlight the innovative part of the present invention, elements that are not so closely related to solving the technical problems proposed by the present invention are not introduced in the present embodiment, but this does not indicate that other elements are not present in the present embodiment.
The above description is only for illustrative purposes and does not limit the technical aspects of the present invention.
Compared with the prior art, in the pixel circuit provided in this embodiment, the plurality of control modules drive the display modules in turn for a time period T/N, the data write-in time is 1/N of the write-in time of the pixel circuit of the display module driven by one control module, the refresh frequency of the pixel circuit is increased to N times of the refresh frequency of the pixel circuit driven by one control module, and the limitation of the response speed of the active device on the refresh frequency of the pixel circuit is reduced.
A second embodiment of the present invention relates to a pixel circuit. The present embodiment is a further refinement of the first embodiment, and specifically describes a specific configuration of the control module. In addition, those skilled in the art can understand that in practical application, the control module may also adopt circuits with other structures, which are not described herein.
Specifically, as shown in fig. 2, the number of control modules is 2, and the control modules are a first control module 201 and a second control module 202. The pixel circuit further includes: a display module 203, a selection module 204, and a power module 205. The first control module 201 includes a first driver submodule 2011 and a first switch submodule 2012, and the second control module 202 includes a second driver submodule 2021 and a second switch submodule 2022.
In one embodiment, first driver sub-module 2011 and second driver sub-module 2021 are of a typical 2T1C configuration. The first driver sub-module 2011 includes: the first active device, the second active device and the first energy storage element; the control end of the first active device is connected with the first scanning signal line, the first end of the first active device is electrically connected with the first data signal line, the second end of the first active device is electrically connected with the control end of the second active device, the first end of the second active device is electrically connected with the power module 205, the second end of the second active device is electrically connected with the first end of the first switch sub-module 2012, and the first energy storage element is connected in parallel between the control end of the second active device and the first end of the second active device; the control terminal of the first switch submodule 2012 is electrically connected to the selection module 204, the second terminal of the first switch submodule 2012 is connected to the anode of the display module 203, and the cathode of the display module is grounded. The second driver sub-module 2021 includes: a third active device, a fourth active device and a second energy storage element; the control end of the third active device is connected with the second scanning signal line, the first end of the third active device is electrically connected with the second data signal line, the second end of the third active device is electrically connected with the control end of the fourth active device, the first end of the fourth active device is electrically connected with the power module, the second end of the fourth active device is electrically connected with the first end of the second switch submodule 2022, and the second energy storage element is connected between the control end of the fourth active device and the first end of the fourth active device in parallel; the control terminal of the second switch submodule 2022 is electrically connected to the selection module 204, and the second terminal of the second switch submodule 2022 is connected to the anode of the display module 203.
In one embodiment, the first energy storage element and the second energy storage element are capacitors. The first active device, the second active device, the third active device and the fourth active device are all P-type transistors, or the first active device, the second active device, the third active device and the fourth active device are all N-type transistors.
In one embodiment, the selection module may be an N-to-1 gating unit, for example, the gating module is an N-to-1 gating device, N output terminals of the N-to-1 gating device are connected to the N switching sub-modules in a one-to-one correspondence, and transistors of the switching sub-modules of each control module are of the same type. When the N output ends of the gating device of which the N is selected to be 1 output selection signals in turn, the switch sub-modules of the N control modules are conducted in turn.
In one embodiment, the first switch sub-module 2012 is a P-type transistor and the second switch sub-module 2022 is an N-type transistor. For example, the selection module is a signal generator, when the selection module generates a high level signal, the second switch sub-module 2022 is turned on, and the second driver sub-module 2021 drives the display module; when the selection module generates a low level signal, the first switch sub-module 2012 is turned on, and the first driving sub-module 2011 drives the display module.
In another embodiment, the first switch sub-module 2012 is an N-type transistor and the second switch sub-module 2022 is a P-type transistor. In this case, the selection module may be a signal generator, and when the selection module generates a high level signal, the first switching sub-module 2012 is turned on, and when the selection module generates a low level signal, the second switching sub-module 2022 is turned on.
It should be noted that, as will be understood by those skilled in the art, the first switch submodule 2012 and the second switch submodule 2022 may also be other devices, or a circuit formed by transistors and/or other devices, and the specific circuit structure of the switch submodule is not limited in this embodiment.
Note that the transistor in this embodiment mode may be a Thin Film Transistor (TFT), that is, a P-type transistor and an N-type transistor, or other types of transistors.
In one embodiment, the first active device, the second active device, the third active device, and the fourth active device may be fabricated by a complementary metal oxide semiconductor CMOS process.
It is worth mentioning that the active device is manufactured through a CMOS process, so that the pixel circuit is lower in power consumption, higher in response speed and higher in anti-interference capability.
In one embodiment, a circuit diagram of a pixel circuit is shown in fig. 3. VDD denotes a power module, VSS denotes a ground terminal, OLED denotes a display module, T1L denotes a second active device, T2L denotes a first active device, T3L denotes a first switch submodule, CstL denotes a first energy storage element, T1R denotes a fourth active device, T2R denotes a third active device, T3R denotes a second switch submodule, CstR denotes a second energy storage element, Select denotes a selection signal output by the selection module, Scan _1L denotes a signal output by the first Scan signal line, Scan _1R denotes a signal output by the second Scan signal line, Data1U denotes a signal output by the first Data signal line, and Data1D denotes a signal output by the second Data signal line. In fig. 3, the first active device, the second active device, the third active device and the fourth active device are all exemplified by P-type TFTs, the first switch submodule is exemplified by N-type TFTs, the second switch submodule is exemplified by P-type TFTs, and the circuit structure of the driver submodule is a typical 2T1C structure. As shown in fig. 4, in the driving timing diagram of the pixel circuit, at time T1, Select is high, T3L is turned on, T3R is turned off, the second driving submodule on the right side cannot control the OLED, Scan _1L is low, Data1U charges and discharges CstL and stores the CstL, and the written Data controls T1L, thereby controlling the current flowing through the OLED. At time T2, Select is low, T3R is turned on, and T3L is turned off, the first driving sub-module on the left side cannot control the OLED, Scan _1R is low, Data1D charges and discharges CstR and stores it in CstR, and the written Data controls T1R, thereby controlling the current flowing through the OLED. Since each control module controls the display module for a time period of T/2, the time T2 is delayed by a time period of T/2 from the time T1.
It is to be noted that, as will be understood by those skilled in the art, in this embodiment, the first active device, the second active device, the third active device and the fourth active device are all exemplified by a P-type TFT, in practical applications, the first active device, the second active device, the third active device and the fourth active device may also be an N-type TFT, and when an N-type TFT is used, a circuit diagram of a pixel circuit is shown in fig. 5. When the N-type TFT is used, the pixel circuit can drive the display module more accurately because the leakage current of the N-type TFT is smaller.
It should be noted that, as will be understood by those skilled in the art, in practical applications, the driving sub-module in the control module may also adopt other structures, for example, a 3T1C structure, and the present embodiment does not limit the specific circuit structure of the driving sub-module.
It should be noted that, for clarity of description, the present embodiment takes 2 control modules as an example to illustrate the structure of the pixel circuit, and those skilled in the art can understand that in practical application, the number of the control modules may be set as required.
The pixel circuit provided by the embodiment of the invention can be applied to Display devices such as an Active Matrix Organic Light Emitting Diode (AMOLED), a Micro Light Emitting Diode (Micro LED), an Active Matrix Liquid Crystal Display (AMLCD), and the like.
It should be noted that each module referred to in this embodiment is a logical module, and in practical applications, one logical unit may be one physical unit, may be a part of one physical unit, and may be implemented by a combination of multiple physical units. In addition, in order to highlight the innovative part of the present invention, elements that are not so closely related to solving the technical problems proposed by the present invention are not introduced in the present embodiment, but this does not indicate that other elements are not present in the present embodiment.
The above description is only for illustrative purposes and does not limit the technical aspects of the present invention.
Compared with the prior art, in the pixel circuit provided in this embodiment, the pixel circuit includes two control modules, each control module drives a display module for a time period of T/2, the data writing time is 1/2 of the writing time of the pixel circuit of the display module driven by one control module, the refresh frequency of the pixel circuit is increased to 2 times of the refresh frequency of the pixel circuit driven by one control module, and the limitation of the response speed of the active device on the refresh frequency of the pixel circuit is reduced.
A third embodiment of the present invention relates to a display device including: the pixel circuit 501 of the first embodiment or the second embodiment is described.
The following describes the driving timing of the display device in conjunction with actual conditions.
Assume that the display device has a resolution of 3840 × 2160, the first Scan signal line of the first driving sub-module of the first row of pixels is Scan _1L, the first Scan signal line of the first driving sub-module of the second row of pixels is Scan _2L, the first Scan signal line of the first driving sub-module of the third row of pixels is Scan _3L … …, and so on, as shown in fig. 6. The second Scan signal line of the second driving sub-module of the first row of pixels is Scan _1R, the second Scan signal line of the second driving sub-module of the second row of pixels is Scan _2R, the second Scan signal line of the second driving sub-module of the third row of pixels is Scan _3R … …, and so on. The first scanning signal lines of the first driving sub-modules of the pixels in the 2160 rows are all connected with the Gate circuit control chip (Gate _ IC _ L) at the left side of the display device, namely Scan _1L to Scan _2160L are controlled by the Gate _ IC _ L, the driving and refreshing frequency of the Gate _ IC _ L is 120Hz, and the first Data signal lines of the first driving sub-modules of the pixels in the 2160 rows are all connected with the Data chip (Data _ IC _ U) at the upper end of the display device. The second scanning signal lines of the second driving sub-modules of the pixels in the 2160 rows are all connected with the Gate circuit control chip (Gate _ IC _ R) at the right side of the display device, namely Scan _1R to Scan _2160R are controlled by the Gate _ IC _ R, the driving refresh frequency of the Gate _ IC _ R is 120Hz, and the second Data signal lines of the second driving sub-modules of the pixels in the 2160 rows are all connected with the Data chip (Data _ IC _ D) at the lower end of the display device. T is a time for scanning one frame, and since the first and second driving sub-modules need to drive the display module 1/2T, respectively, the start time of the second scan signal line of the ith row of Gate _ IC _ R is delayed from the start time of the first scan signal line of the ith row of Gate _ IC _ L by 1/2T time (i is a positive integer less than 2160). In this case, a driving timing chart of the display device is as shown in fig. 7. As can be seen from fig. 7, when the Gate _ IC _ L of the display device scans, the selection signal (Select) output by the selection module is at a high level, the first switch sub-module is turned on, and the second switch sub-module is turned off, so that the second driving sub-module on the right side cannot control the OLED. Scan1L is low, CstL is charged and discharged by the Data signal line (Data1U) of the first row of pixels output by Data _ IC _ U and stored in CstL, and the written Data controls T1L to drive the tube, thereby controlling the current flowing through the OLED. Similarly, when the Gate _ IC _ R of the display device scans, Select is low, T3R is turned on, and T3L is turned off, and the first driving sub-module on the left side cannot control the OLED.
It should be understood that this embodiment is an example of the apparatus corresponding to the first and second embodiments, and may be implemented in cooperation with the first and second embodiments. The related technical details mentioned in the first embodiment and the second embodiment are still valid in this embodiment, and are not described herein again in order to reduce repetition. Accordingly, the related-art details mentioned in the present embodiment can also be applied to the first embodiment and the second embodiment.
It should be noted that each module referred to in this embodiment is a logical module, and in practical applications, one logical unit may be one physical unit, may be a part of one physical unit, and may be implemented by a combination of multiple physical units. In addition, in order to highlight the innovative part of the present invention, elements that are not so closely related to solving the technical problems proposed by the present invention are not introduced in the present embodiment, but this does not indicate that other elements are not present in the present embodiment.
A fourth embodiment of the present invention relates to a driving method applied to the pixel circuit mentioned in the above embodiment, as shown in fig. 8, the driving method including:
step 401: the selection module controls the N control modules to drive the display modules for T/N duration in turn. Wherein N is a positive integer greater than 1, 1/T is the refresh frequency, and T is a positive integer.
Step 402: and the control module drives the display module when determining that the selection module selects the self-driven display module.
In one embodiment, the selection module generates a selection signal and outputs the selection signal to each control module, each control module judges whether the selection signal meets the requirement of the self-driven display module, if so, the selection module selects the self-driven display module, and the driving module drives the display module for T/N time. For example, the selection module is a signal generator, and the pixel circuit includes a first control module and a second control module, i.e., N-2. The first control module comprises a first switch submodule and a first drive submodule, and the first switch submodule is a P-type transistor. The second control module comprises a second switch submodule and a second drive submodule, and the second switch submodule is an N-type transistor. When the selection module generates a high level signal, the second switch submodule is conducted, and the second drive submodule drives the display module. When the selection module generates a low level signal, the first switch submodule is conducted, and the first drive submodule drives the display module.
In another embodiment, the selection module generates a selection signal and determines a current time for driving the control module of the display module. The selection module transmits the selection signal to the determined control module, and the control module receiving the selection signal determines that the selection module selects the self-driven display module to drive the display module. For example, the selection module is an N-to-1 gate, each control module includes a switch submodule and a drive submodule, the transistor types of the switch submodules in each control module are the same, and N output ends of the N-to-1 gate are connected with the N switch submodules in a one-to-one correspondence manner. When N output ends of the gating device of which the N is selected to be 1 output selection signals in turn, the N switch sub-modules are conducted in turn.
It should be understood that this embodiment is a method example corresponding to the first embodiment and the second embodiment, and may be implemented in cooperation with the first embodiment and the second embodiment. The related technical details mentioned in the first embodiment and the second embodiment are still valid in this embodiment, and are not described herein again in order to reduce repetition. Accordingly, the related-art details mentioned in the present embodiment can also be applied to the first embodiment and the second embodiment.
Compared with the prior art, in the pixel circuit provided in this embodiment, the pixel circuit includes two control modules, each control module drives a display module for a time period of T/2, the data writing time is 1/2 of the writing time of the pixel circuit of the display module driven by one control module, the refresh frequency of the pixel circuit is increased to 2 times of the refresh frequency of the pixel circuit driven by one control module, and the limitation of the response speed of the active device on the refresh frequency of the pixel circuit is reduced.
The steps of the above methods are divided for clarity, and the implementation may be combined into one step or split some steps, and the steps are divided into multiple steps, so long as the same logical relationship is included, which are all within the protection scope of the present patent; it is within the scope of the patent to add insignificant modifications to the algorithms or processes or to introduce insignificant design changes to the core design without changing the algorithms or processes.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (10)
1. A pixel circuit, comprising: the device comprises a display module, a selection module and N control modules; the selection module is used for controlling the N control modules to drive the display modules in turn, the time length of driving the display modules by each control module is T/N, N is a positive integer greater than 1, 1/T is the refresh frequency of a pixel circuit driven by one control module, and T is a positive integer.
2. The pixel circuit according to claim 1, wherein each of the control modules comprises: the driving submodule and the switch submodule; the driving submodule is connected with the switch submodule in series, and when the switch submodule is conducted under the control of the selection module, the driving submodule drives the display module.
3. The pixel circuit according to claim 1, wherein the number of the control modules is 2, and the control modules are a first control module and a second control module respectively.
4. The pixel circuit of claim 3, further comprising a power supply module, wherein the first control module comprises a first driver sub-module and a first switch sub-module, and wherein the second control module comprises a second driver sub-module and a second switch sub-module;
wherein the first driver sub-module includes: the first active device, the second active device and the first energy storage element; the control end of the first active device is connected with a first scanning signal line, the first end of the first active device is electrically connected with a first data signal line, the second end of the first active device is electrically connected with the control end of the second active device, the first end of the second active device is electrically connected with the power module, the second end of the second active device is electrically connected with the first end of the first switch submodule, and the first energy storage element is connected between the control end of the second active device and the first end of the second active device in parallel; the control end of the first switch submodule is electrically connected with the selection module, the second end of the first switch submodule is connected with the anode of the display module, and the cathode of the display module is grounded;
the second drive sub-module includes: a third active device, a fourth active device and a second energy storage element; the control end of the third active device is connected with a second scanning signal line, the first end of the third active device is electrically connected with a second data signal line, the second end of the third active device is electrically connected with the control end of the fourth active device, the first end of the fourth active device is electrically connected with the power module, the second end of the fourth active device is electrically connected with the first end of the second switch submodule, and the second energy storage element is connected between the control end of the fourth active device and the first end of the fourth active device in parallel; and the control end of the second switch submodule is electrically connected with the selection module, and the second end of the second switch submodule is connected with the anode of the display module.
5. The pixel circuit according to claim 4, wherein the first energy storage element and the second energy storage element are capacitors;
the first active device, the second active device, the third active device and the fourth active device are all P-type transistors, or the first active device, the second active device, the third active device and the fourth active device are all N-type transistors.
6. The pixel circuit of claim 4, wherein the first switch submodule is a P-type transistor and the second switch submodule is an N-type transistor; or the like, or, alternatively,
the first switch submodule is an N-type transistor, and the second switch submodule is a P-type transistor.
7. The pixel circuit according to any of claims 1 to 6, wherein the selection module comprises: and selecting 1 from N.
8. The pixel circuit according to claim 5 or 6, wherein the P-type transistor is a P-type thin film transistor, and the N-type transistor is an N-type thin film transistor.
9. A display device comprising the pixel circuit according to any one of claims 1 to 8.
10. A driving method applied to the pixel circuit according to any one of claims 1 to 8, comprising:
the selection module controls N control modules to drive the display module for T/N duration in turn; n is a positive integer greater than 1, 1/T is a refresh frequency, and T is a positive integer;
and the control module drives the display module when determining that the selection module selects to drive the display module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811482315.9A CN111354298A (en) | 2018-12-05 | 2018-12-05 | Pixel circuit, display device and driving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811482315.9A CN111354298A (en) | 2018-12-05 | 2018-12-05 | Pixel circuit, display device and driving method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111354298A true CN111354298A (en) | 2020-06-30 |
Family
ID=71196688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811482315.9A Pending CN111354298A (en) | 2018-12-05 | 2018-12-05 | Pixel circuit, display device and driving method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111354298A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109767744A (en) * | 2019-03-21 | 2019-05-17 | 深圳吉迪思电子科技有限公司 | A kind of pixel circuit and its driving method, display device and electronic equipment |
| CN113470569A (en) * | 2021-07-01 | 2021-10-01 | 京东方科技集团股份有限公司 | Drive circuit, display panel and electronic equipment |
| CN113793566A (en) * | 2021-09-29 | 2021-12-14 | 合肥维信诺科技有限公司 | Pixel driving circuit and driving method thereof |
| CN113990247A (en) * | 2021-12-08 | 2022-01-28 | 深圳市华星光电半导体显示技术有限公司 | Pixel driving circuit and display device |
| CN114203104A (en) * | 2022-01-28 | 2022-03-18 | 上海天马微电子有限公司 | Pixel circuit, driving method thereof and display device |
| CN114495781A (en) * | 2020-10-23 | 2022-05-13 | 京东方科技集团股份有限公司 | Pixel driving structure, driving method and preparation method thereof, and array substrate |
| CN114758630A (en) * | 2022-06-16 | 2022-07-15 | 惠科股份有限公司 | Backlight module, driving method thereof and display device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1700287A (en) * | 2004-05-19 | 2005-11-23 | 三星电子株式会社 | Driving device and driving method for a light emitting device, and a display panel and display device having the driving device |
| CN1720567A (en) * | 2002-12-04 | 2006-01-11 | 皇家飞利浦电子股份有限公司 | Active matrix pixel cell with multiple drive transistors and method for driving such a pixel |
| CN101174381A (en) * | 2006-10-31 | 2008-05-07 | Lg.菲利浦Lcd株式会社 | Organic light emitting diode display and driving method thereof |
| CN101937647A (en) * | 2010-09-02 | 2011-01-05 | 上海交通大学 | Complementary driving type pixel circuit |
| CN103489404A (en) * | 2013-09-30 | 2014-01-01 | 京东方科技集团股份有限公司 | Pixel unit, pixel circuit and driving method of pixel circuit |
| CN104021763A (en) * | 2014-06-11 | 2014-09-03 | 合肥鑫晟光电科技有限公司 | Pixel circuit, display device and drive method of pixel circuit |
| CN107452336A (en) * | 2017-09-25 | 2017-12-08 | 京东方科技集团股份有限公司 | Pixel-driving circuit and its driving method, display panel and its driving method |
| CN108717841A (en) * | 2018-05-29 | 2018-10-30 | 京东方科技集团股份有限公司 | Pixel-driving circuit, image element driving method, OLED display panel and its driving circuit and driving method |
-
2018
- 2018-12-05 CN CN201811482315.9A patent/CN111354298A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1720567A (en) * | 2002-12-04 | 2006-01-11 | 皇家飞利浦电子股份有限公司 | Active matrix pixel cell with multiple drive transistors and method for driving such a pixel |
| CN1700287A (en) * | 2004-05-19 | 2005-11-23 | 三星电子株式会社 | Driving device and driving method for a light emitting device, and a display panel and display device having the driving device |
| CN101174381A (en) * | 2006-10-31 | 2008-05-07 | Lg.菲利浦Lcd株式会社 | Organic light emitting diode display and driving method thereof |
| CN101937647A (en) * | 2010-09-02 | 2011-01-05 | 上海交通大学 | Complementary driving type pixel circuit |
| CN103489404A (en) * | 2013-09-30 | 2014-01-01 | 京东方科技集团股份有限公司 | Pixel unit, pixel circuit and driving method of pixel circuit |
| CN104021763A (en) * | 2014-06-11 | 2014-09-03 | 合肥鑫晟光电科技有限公司 | Pixel circuit, display device and drive method of pixel circuit |
| CN107452336A (en) * | 2017-09-25 | 2017-12-08 | 京东方科技集团股份有限公司 | Pixel-driving circuit and its driving method, display panel and its driving method |
| CN108717841A (en) * | 2018-05-29 | 2018-10-30 | 京东方科技集团股份有限公司 | Pixel-driving circuit, image element driving method, OLED display panel and its driving circuit and driving method |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109767744A (en) * | 2019-03-21 | 2019-05-17 | 深圳吉迪思电子科技有限公司 | A kind of pixel circuit and its driving method, display device and electronic equipment |
| CN114495781A (en) * | 2020-10-23 | 2022-05-13 | 京东方科技集团股份有限公司 | Pixel driving structure, driving method and preparation method thereof, and array substrate |
| CN114495781B (en) * | 2020-10-23 | 2023-12-12 | 京东方科技集团股份有限公司 | Pixel driving structure, driving method and preparation method thereof and array substrate |
| CN113470569A (en) * | 2021-07-01 | 2021-10-01 | 京东方科技集团股份有限公司 | Drive circuit, display panel and electronic equipment |
| CN113793566A (en) * | 2021-09-29 | 2021-12-14 | 合肥维信诺科技有限公司 | Pixel driving circuit and driving method thereof |
| CN113990247A (en) * | 2021-12-08 | 2022-01-28 | 深圳市华星光电半导体显示技术有限公司 | Pixel driving circuit and display device |
| CN114203104A (en) * | 2022-01-28 | 2022-03-18 | 上海天马微电子有限公司 | Pixel circuit, driving method thereof and display device |
| CN114203104B (en) * | 2022-01-28 | 2023-03-10 | 上海天马微电子有限公司 | Pixel circuit, driving method thereof and display device |
| CN114758630A (en) * | 2022-06-16 | 2022-07-15 | 惠科股份有限公司 | Backlight module, driving method thereof and display device |
| US11842688B1 (en) | 2022-06-16 | 2023-12-12 | HKC Corporation Limited | Backlight module, driving method and display device thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111354298A (en) | Pixel circuit, display device and driving method | |
| US9947272B2 (en) | Organic light-emitting diode display device | |
| US10916184B2 (en) | Array substrate and driving method thereof, display panel, display device | |
| US11069298B2 (en) | Driving circuit, display panel, driving method and display device | |
| CN108492783B (en) | Pixel driving circuit of AMOLED display device and driving method of AMOLED display device | |
| US11600225B2 (en) | Display panel and driving method | |
| US11915648B2 (en) | Display apparatus and driving method thereof | |
| US9472140B2 (en) | Drive circuit, optoelectronic device, electronic device, and drive method | |
| US9805650B2 (en) | Organic light emitting diode pixel driving circuit and display device | |
| CN111179849B (en) | Control unit, control circuit, display device and control method thereof | |
| KR20140071236A (en) | Display device and driving method thereof | |
| US11114061B2 (en) | Light-emission control signal generating device and display device | |
| CN111052216A (en) | Display device and driving method thereof | |
| US10692431B2 (en) | Gate driver, display apparatus having the same and method of driving display panel using the same | |
| US11538405B2 (en) | Pixel driving circuit, pixel driving method, display panel and display device | |
| KR20170042721A (en) | Amoled drive apparatus and drive dethod | |
| CN106847190B (en) | Pixel charging circuit, driving method thereof and organic light emitting display device | |
| CN110322827B (en) | Digital driving method of display panel and display panel | |
| US9135855B2 (en) | Display device, electronic device, driving circuit, and driving method thereof | |
| KR20150005922A (en) | Electro-optical device and method for driving the same | |
| CN110675826A (en) | Display panel, driving method thereof and display device | |
| CN113763872B (en) | Pixel circuit, driving method thereof and display device | |
| CN111369949B (en) | Display panel and scanning driving method thereof | |
| US20100085349A1 (en) | Display device | |
| US11935469B2 (en) | Pixel circuit array and driving method thereof, display panel and driving method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20201208 Address after: No.146 Tianying Road, high tech Zone, Chengdu, Sichuan Province Applicant after: Chengdu CHENXIAN photoelectric Co.,Ltd. Address before: 215300 room 3, 188 CHENFENG Road, Yushan Town, Kunshan City, Suzhou, Jiangsu. Applicant before: Kunshan New Flat Panel Display Technology Center Co.,Ltd. Applicant before: KunShan Go-Visionox Opto-Electronics Co.,Ltd. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200630 |